Derivative Instruments (Summary Of The Effect Of Derivative Instruments On The Consolidated Statements Of Changes In Equity And Income) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ (13,730)	$ 13,551
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)		(595)	104
Interest Rate Swap [Member]
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[1]	(1,314)	(443)
Cross Currency Swaps [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(1,350)	3,062
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[2]	719	547
Currency Forward Agreements [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		(7,523)	11,991
Amount of Income (Expense) Reclassified from AOCI into Earnings (Effective Portion)	[2]	0	0
Interest Expense [Member] | Interest Rate Swap [Member]
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)		$ (4,857)	$ (1,502)

[1] (1)Included in "Interest expense, net" in the accompanying consolidated statements of income for the three months ended March 31, 2016 and 2015.

[2] Included in "Other income" in the accompanying consolidated statements of income for the three months ended March 31, 2016 and 2015.